121320013203187 has 2 divisors, whose sum is σ = 121320013203188. Its totient is φ = 121320013203186.

The previous prime is 121320013203127. The next prime is 121320013203211. The reversal of 121320013203187 is 781302310023121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121320013203187 - 2¹⁹ = 121320012678899 is a prime.

It is not a weakly prime, because it can be changed into another prime (121320013203127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660006601593 + 60660006601594.

It is an arithmetic number, because the mean of its divisors is an integer number (60660006601594).

Almost surely, 2^{121320013203187} is an apocalyptic number.

121320013203187 is a deficient number, since it is larger than the sum of its proper divisors (1).

121320013203187 is an equidigital number, since it uses as much as digits as its factorization.

121320013203187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 121320013203187 in words is "one hundred twenty-one trillion, three hundred twenty billion, thirteen million, two hundred three thousand, one hundred eighty-seven".